Patent US5589431A successfully refreshed from Google Patents.
US5589431A
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Double metal cyanide complex catalysts
Assignee: Lyondell Chemical Technology LP
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Filing: 1995-06-07
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Granted: 1996-12-31
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Expires: 2015-06-07
Abstract
Abstract Improved double metal cyanide catalysts are disclosed. The substantially amorphous catalysts of the invention are more active for polymerizing epoxides than conventional DMC catalysts, which have a substantial crystalline component. Polyol products made with the catalysts are unusually clear, have exceptionally low unsaturations, and contain no detectable amount of low molecular weight polyol impurities. A method of making the improved DMC catalysts, which involves intimately combining the reactants, is also disclosed.
Inventors
- 👤 Bi Le-Khac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:28
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2663; B; B01; B01J; B01J27/00; B01J27/24; B01J27/26; C08G59/00; C08G59/18; C08G65/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
35 words
A method of preparing an epoxide polymer, said method comprising polymerizing an epoxide in the presence of a catalyst which comprises at least about 70 wt. % of a substantially amorphous double metal cyanide complex.
Claim 2
Independent Claim
35 words
A method of preparing an epoxide polymer, said method comprising polymerizing an epoxide in the presence of a catalyst which comprises at least about 70 wt. % of a substantially amorphous double metal cyanide complex.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the catalyst further comprises up to about 30 wt. % of a highly crystalline double metal cyanide compound.
Claim 4
Independent Claim
30 words
A method of preparing an epoxide polymer, said method comprising polymerizing an epoxide in the presence of a catalyst which consists essentially of a substantially amorphous double metal cyanide complex.
Claim 5
Independent Claim
30 words
A method of preparing an epoxide polymer, said method comprising polymerizing an epoxide in the presence of a catalyst which consists essentially of a substantially amorphous double metal cyanide complex.
Claim 6
Dependent Claim
13 words
The method of claim 3 wherein the epoxide polymer is a polyether polyol.
Claim 7
Dependent Claim
34 words
A low monol polyol composition prepared using a catalyst which comprises at least about 70 wt. % of a substantially amorphous double metal cyanide (DMC) complex, wherein the catalyst is useful for polymerizing epoxides.
Claim 8
Dependent Claim
34 words
A low monol polyol composition prepared using a catalyst which comprises at least about 70 wt. % of a substantially amorphous double metal cyanide (DMC) complex, wherein the catalyst is useful for polymerizing epoxides.
Claim 9
Dependent Claim
47 words
A low monol polyol composition prepared using a catalyst which comprises at least about 70 wt. % of a substantially amorphous double metal cyanide (DMC) complex, and up to about 30 wt. % of a highly crystalline DMC compound, wherein the catalyst is useful for polymerizing epoxides.
Claim 10
Dependent Claim
47 words
A low monol polyol composition prepared using a catalyst which comprises at least about 70 wt. % of a substantially amorphous double metal cyanide (DMC) complex, and up to about 30 wt. % of a highly crystalline DMC compound, wherein the catalyst is useful for polymerizing epoxides.
Claim 11
Dependent Claim
35 words
A low monol polyol composition prepared using a catalyst which comprises a double metal cyanide (DMC) complex catalyst that exhibits a powder X-ray diffraction pattern having substantially no sharp lines at about 5.1 (d-spacing, angstroms).
Claim 12
Dependent Claim
35 words
A low monol polyol composition prepared using a catalyst which comprises a double metal cyanide (DMC) complex catalyst that exhibits a powder X-ray diffraction pattern having substantially no sharp lines at about 5.1 (d-spacing, angstroms).
Claim 13
Dependent Claim
30 words
A low monol polyol composition prepared using a catalyst which comprises a double metal cyanide (DMC) complex catalyst that has a surface area less than about 30 m 2 /g.
Claim 14
Dependent Claim
30 words
A low monol polyol composition prepared using a catalyst which comprises a double metal cyanide (DMC) complex catalyst that has a surface area less than about 30 m 2 /g.
Claim 15
Dependent Claim
17 words
The low monol polyether polyol composition of claim 7 having an unsaturation less than about 0.006 meq/g.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-31 | 2000-07-01 | 2000-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-31 | 2004-07-01 | 2004-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-31 | 2008-07-01 | 2008-12-31 | $7700.00 | Window Closed / Lapsed |